The present document specifies the stage three (protocol description) of the Originating Identification Presentation (OIP) simulation service and the Originating Identification Restriction (OIR) simulation services@ based on stage one and two of the ISDN CLIP [4] and CLIR [5] supplementary service. Within the TISPAN NGN Release 1 the stage 3 description is specified using the IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP). NOTE: It should be noted that the behaviour described in this the present document does not take into account other behaviours that may be specified in other applications and care needs to be taken when designing the filters etc. when two or more applications are involved in a session.